APA (7th ed.) Citation
Setton, K. M. (1969). The Age of chivalry. National Geographic Society.
Chicago Style (17th ed.) Citation
Setton, Kenneth Meyer. The Age of Chivalry. Washington: National Geographic Society, 1969.
MLA (9th ed.) Citation
Setton, Kenneth Meyer. The Age of Chivalry. National Geographic Society, 1969.
Warning: These citations may not always be 100% accurate.